Tandem-spring and friction draft-rigging.



J. P. OOONNOR. TANDEM SPRING AND FRICTION DRAFT BIGGING.

APPLICATION FILED JULY 28, 1909.

2 SHEETS-SHEET 1.

Patented Aug. 2, 1910.

J. P. OGONNOR. TANDEM SPRING AND FRICTION DRAFT RIGGING.

APPLICATION FILED JULY 28, 1909- I %34, Patented Aug. 2, 1910.

' 2 SHEETS-*SHEET 2.

i I E915 following is a To all whom it may concern:

.possess at one and the JOHN F. OCONNOR, OF CHICAGO, ILLINOIS ASSIGNOR,

BY MESN'E ASSIGNMENTS, TO

WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

v TANDEM-SPRING AND FRICTION DRAFT-RIGGING.

Specification of LettersPatent. Patented Aug. 2, 11910.

.hpplication filed July 28, 1909. Serial .No. 510,074,.

Be it known that I, JOHN F. OCoNNoR, a c 1tizen of the United States, residing in Ghlcago, in the county 0 Cook and State of Illinois, have invented a ew and useful Im provement in Combined Tandem-Spring and Friction Draft-Rigging, of which the specification.

My invention relates to draft rigging for railway cars.

The object of my a railway draft cient and durable construction, which will same time the. pecullar merits and advantages of the ordinary tandem spring draft ri ging without its llmitations or defects, an also the peculiar merits and advantages of. a friction draft rig ing without its limitations or defects, an in which the combined tandem spring invention is to provide and friction gear will not necessarily ex-' ce'ed in length that of the ordinary tandem spr ng gear, and in which the two tandem sprlngs and the friction cushioning devices will all simultaneously act and cooperate to.

cushion both pulling and bufi'ing shocks of the draw-bar and efiiciently cushion both light and extremely heavy blows or shocks,

and in which the friction cushionin mechanism will cooperate to prevent sud en and violent recoil of the powerful and. simultaneously acting tandem springs, and in which the tandem springs will eoacttoinsure certain and reliable release action.

' 1. Fig. 4 is a detail plan View of the wedge member of the friction cushioning mechanism. Fig. 5 is an end View of the friction cushioning devices. Fig. 6 is an end View of the friction wedge and Fig. 7 is a detail elevation of one of the friction shoes.

In the drawing, A represents the draft sills or members of the car frame to which the draft rigging is directly applied, prefrigging of a simple, effiexternal rim or flange erably rolled steel .center bar, B abutment block B for engagement with the two middle followers, C the draft lugs or stop members secured to the draft sills and having front, rear and intermediate stop shoulders C C C C for the followers E E E E to abut against, and also preferably supplemental stops or shoulders C C C C to limit the movement of the followers and the compression of the sprin s. All of these arts are or may be of any sultable or stand ging construction.

F F are tandem arranged springs, the former between the two foremost followers and the latter between the two rearmost followers and F is a supplemental spring of sills, B the drawsmaller diameter withln one of the tandem springs F p G is a friction shell or cylinder interposed between the followers E E and fitting within the spring F, and having'at one end an for one end of the spring F to react against, and having an internal longitudinal friction face 9 paral-v lel with the draw-bar. The'head or end 9 of the friction shell G is provided with a countersink recess 9 to accommodate the nut g of the connectin rod 9 of the friction cushioning mechanlsm.

G are cooperating segmental friction shoes, preferably three in number fitting within the friction shell G, and having ex ternal friction faces 9 in sliding frictional engagement with the internal friction face of the friction shell G,'and each provided with an external flange or segmental rim 1 against which the other end of the spring F abuts. The segmental friction shoes G also each have an inner inclined or wedge face 9* parallel and corresponding to one of the wedge faces 9 of the three-faced or pyramidal wedge G by which the friction shoes are spread or forced into snug frictional engagement with the friction shell G. Antifriction rollers g! are interposed between the wedge faces of the friction shoes G and of the pyramidal wedge G said shoes and wedge being also provided with shoulders g g to keep the rollers in position, and the shoes'havlng also shoulders g to keep the rollers from slipping out of place lengthwise. The connecting rod 9 between the wedge G and the friction shell G serves not ard tandem spring draft rig the draft yoke, provided with an only to hold all of the parts or devices of the friction cushioning mechanism assembled, but also to maintain the spring F under an initial tension or compression.

The three segmental friction shoes G are preferably oblique, that is tosay, their parallel meeting edges 9 extend at an angle to the axis of the longitudinally movable friction shell Gr, so that as the friction shoes Gr reciprocate within said shell G, the meeting edges of the shoes will not produce any unevenness of wear on the internal friction face of the cylinder G. as they would tend to do if the meeting edges of the friction shoes were parallel with the axis of the cylinder instead of inclined thereto.

H is the removable tie-plate or guide secured to the draft sills A by short bolts h having threaded nuts h. The tie-plate H is furnished with a longitudinal channel h to accommodate the lower member of the draft yoke B.

In operation, under either pullingor buffing blows of the draw-bar, the two tandem springs F F and the supplemental spring F within the spring F and the cushioning mechanism or devices G G all simulta-,

neously act and cooperate to cushion the draw-bar movement, and when the pressure of the draw-bar against the cushioning springs and devices is relieved, the friction cushioning devices G G cooperate to prevent sudden, violent or injurious recoil, and the springs coact with the friction shell, friction shoes, wedge and anti-friction rollers between the wedge and shoes to insure certain and reliable release action and thus to enable the draft rigging to properly cushion successive blows of the draw-bar thereon.

I claim 1. In a draft rigging, the combination with the draw-bar, draft yoke, stop members and front, rear and intermediate followers, the draft yoke having an abutment to engage the intermediate followers, of tandem arranged springs, a supplemental spring within one of the tandem springs and a friction cushioning mechanism within the other tandem spring comprising a friction shell having an external rim against which one end of said last mentioned spring reacts, and a. series of segmental friction shoes within said friction shell, and having each an external flange against which the other end of said spring reacts, and provided each with an inner'wedge face, a pyramidal wedge and anti-frictionrollers interposed between said wedge and vsaid friction shoes, substantially as specified.

2. A combined tion draft rigging comprising m cooperative combination, a. draw-bar, draft yoke having an abutment for engagement with intermediate followers, stop members, front, rear and intermediate followers, tandem springs, and a friction cushioning mechtandem spring and fricanism within one of, said springs having a friction shell with an internal cylindrical friction face and an external rim to engage one end of said spring, and segmental friction shoes having external cylindrical friction faces and external shoulders to engage the other end of said spring and a. central wedge acting to spread outwardly said friction shoes, substantially as specified.

3. A combined tandem spring and friction draft rigging comprising in combination tandem sprlngs, two pairs of followers, a friction shell, friction shoes within the shell and a. central wedge for spreading the shoes, said friction shell, shoes and wedge extending between one pair of said followers and within one of said springs, one of said springs reacting at one end against said friction shell and at the other end against the frictionshoes, and the other of said springs being between the other pair of followers and reacting thereagainst, both said springs and said friction shell and shoes all coo crating to cushion both pulling and bufling strains, substantially as specified.

JOHN F. OCONNOR. l/Vitnesses:

EDMUND ADcooK, H. M. MUNDAY. 

